Marooned on a desert island, Dr. Robert Farlow and wealthy toxicologist Count Ito Onato both fall in love with Lora, a beautiful Japanese-American girl. Lora prefers Robert but decides to reject him because of his excessive fondness for drinking. After their rescue, Lora marries Count Ito, but Robert, still in love and resolving to win her, stops drinking, and soon attains a reputation in medicine matched only by the count's. Again Robert encounters Lora and asks her to elope with him, but she refuses. The count, however, suspects that his wife has been unfaithful and poisons her. Upon learning that she is innocent, the count decides to give Lora a massive transfusion of his own blood, knowing that the operation will be fatal to him. Lora survives to give birth to Ito's son, and later, she marries the repentant Robert.